Engine exhaust system and motor vehicle

Abstract

A tail gas treatment system is located on the right side of an engine assembly, a heat dissipation system is located on the left side of the engine assembly, and an exhaust corrugated pipeline assembly in the engine exhaust system extends downwards to the bottom of the engine assembly after being led out from the left side of the engine assembly. And after transversely penetrating out of the bottom of the engine assembly, the engine assembly is connected with the post-processing assembly. A heat dissipation system is arranged on the left instead of the right, an after-treatment system is arranged on the right instead of the left, an exhaust corrugated pipeline assembly is led out of the left side of an engine assembly, extends downwards to the bottom of the engine assembly, transversely penetrates out of the bottom of the engine assembly and is connected with an after-treatment assembly, and a formed pipeline does not pass through the top space of the engine assembly. And the problem of space limitation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor vehicle manufacturing, in particular to an engine exhaust system and a motor vehicle. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] To ensure the SCR post-treatment performance (urea injection accuracy and urea atomization rate) of the exhaust system of medium and large rear-drive motor vehicles, the engine compartment needs to have sufficient X, Y, and Z design space for arranging the longer exhaust corrugated pipe assembly in the exhaust system.

[0004] The exhaust bellows assembly is the connecting pipe between the engine's supercharger and the after-treatment system, used to send the exhaust gas from the engine to the after-treatment system. Figure 1-Figure 5 As shown, one end of the exhaust bellows assembly 1 is connected to the engine assembly 5, and the other end is led out from the side, passes through the inclined corrugated section 8 to reach the high point near the top of the engine, and then passes through the vertical straight section to connect to the post-processing assembly 3, wherein the urea injection port 7 is arranged on the straight section of the exhaust bellows assembly. The post-processing assembly 3 in this structure is located on the left side of the engine assembly, and the cooling system assembly 6 is located on the right side of the engine assembly.

[0005] When such rear-drive motor vehicles are medium-to-large buses, they will be equipped with onboard toilets and other similar equipment. At this time, with the vehicle's forward direction as the X direction, since the passenger door must be on the right side of the vehicle (Y direction), and the cooling system occupies a large X-direction space in the engine compartment, in such rear-drive buses with onboard toilets, the cooling system needs to be arranged on the left side of the engine assembly (the side away from the door) to reserve space for the door and the onboard toilet. Affected by this, the aftertreatment system will be adjusted to the right side of the engine assembly, and the exhaust bellows assembly will be arranged across the engine assembly. However, due to the space limitation of the engine compartment, in this way, the top space of the engine assembly can no longer meet the arrangement space of the exhaust bellows assembly, resulting in the exhaust bellows assembly being difficult to arrange when the rear-drive motor vehicle is equipped with an onboard toilet. Utility Model Content

[0006] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides an engine exhaust system and a motor vehicle, changes the heat dissipation system from right to left, and changes the after-treatment system from left to right. After the exhaust corrugated pipe assembly is led out from the left side of the engine assembly, it extends downward to the bottom of the engine assembly, and after passing through the bottom of the engine assembly horizontally, it is connected to the after-treatment assembly. The formed pipeline arrangement does not pass through the top space of the engine assembly, thereby solving the problem of space limitation.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The first aspect of the utility model provides an engine exhaust system, which has an exhaust bellows assembly, wherein the exhaust bellows assembly includes an exhaust bellows front section and an exhaust bellows rear section, wherein the exhaust bellows front section is arranged in a vertical direction, and the exhaust bellows rear section is arranged in a horizontal direction, wherein one end of the exhaust bellows front section is connected to the engine assembly, and the other end is connected to one end of the exhaust bellows rear section through a bent pipe, and the other end of the exhaust bellows rear section is connected to an exhaust gas treatment system; the exhaust gas treatment system is located on the right side of the engine assembly, and the heat dissipation system is located on the left side of the engine assembly.

[0009] Furthermore, one end of the front section of the exhaust bellows is connected to the engine assembly via a pressurized air outlet adapter.

[0010] Furthermore, the front section of the exhaust bellows is connected to the vehicle frame assembly via a front section fixing bracket.

[0011] Furthermore, the rear section of the exhaust bellows is connected to the vehicle frame assembly via a fixing bracket.

[0012] Furthermore, the fixing bracket is connected to the adapter bracket, the adapter bracket is connected to the "L"-shaped fixing bracket, and the "L"-shaped fixing bracket is fixed on the frame assembly.

[0013] Furthermore, a suspension cushion is provided between the adapter bracket and the "L"-shaped fixed bracket.

[0014] Furthermore, the urea injection port is arranged on a straight section of the rear section of the exhaust bellows.

[0015] Furthermore, the exhaust bellows assembly is led out from the left side of the engine assembly, extends downward to the bottom of the engine assembly, and is connected to the post-processing assembly after passing through the bottom of the engine assembly horizontally.

[0016] Furthermore, the surface of the exhaust bellows assembly is covered with a heat insulating material.

[0017] A second aspect of the utility model provides a motor vehicle having an engine assembly located in a rear compartment of the vehicle and equipped with an on-board toilet, wherein the engine assembly is connected to the engine exhaust system.

[0018] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0019] 1. In rear-drive vehicles with special uses such as on-board toilets, the cooling system is changed from right to left, and the after-treatment system is changed from left to right to meet the space requirements of the door and the on-board toilet. At the same time, the exhaust corrugated pipe assembly is led out from the left side of the engine assembly, extends downward to the bottom of the engine assembly, and then passes horizontally through the bottom of the engine assembly and connects to the after-treatment assembly. The resulting pipe arrangement does not pass through the top space of the engine assembly, solving the problem of space limitation.

[0020] 2. The urea injection port is arranged on the straight section of the rear section of the exhaust bellows. Since the rear section of the exhaust bellows passes through the bottom of the engine assembly, it is longer and can provide more reaction space, thereby enhancing the urea injection accuracy and urea atomization rate, and indirectly improving the post-treatment work efficiency.

[0021] 3. After the pipeline layout structure is changed, the asynchronous vibration between the frame can be completely attenuated and absorbed by the suspension cushion and the bellows section, thereby reducing the risk of fatigue fracture of the exhaust bellows and ensuring its working reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 It is a side view structural schematic diagram of an exhaust system in the prior art provided by one or more embodiments of the utility model;

[0024] Figure 2 It is a schematic diagram of the main structure of the exhaust system in the prior art provided by the utility model;

[0025] Figure 3 It is a schematic diagram of the side view structure of an engine provided by the utility model and equipped with a prior art exhaust system;

[0026] Figure 4 It is a schematic diagram of the main structure of an engine provided by the utility model and equipped with a prior art exhaust system;

[0027] Figure 5 It is a schematic diagram of a top view of an engine provided by the utility model and equipped with a prior art exhaust system;

[0028] Figure 6 is a side view structural schematic diagram of an exhaust system provided by one or more embodiments of the utility model;

[0029] Figure 7 is a schematic diagram of the main structure of an exhaust system provided by one or more embodiments of the utility model;

[0030] Figure 8 is a schematic diagram of a top view of the exhaust system provided by one or more embodiments of the utility model;

[0031] Fig. 9 is a schematic diagram of a side view of an engine equipped with an exhaust system provided by one or more embodiments of the utility model;

[0032] Fig.10 is a schematic diagram of the front view of an engine equipped with an exhaust system provided by one or more embodiments of the utility model;

[0033] Fig.11 It is a schematic diagram of a top view of an engine equipped with an exhaust system provided by one or more embodiments of the utility model.

[0034] Figure 1-Figure 5 Middle: 1 exhaust bellows assembly, 2 exhaust bellows bracket, 3 after-treatment assembly, 4 engine assembly, 5 frame assembly, 6 cooling system, 7 urea injection port, 8 exhaust bellows assembly corrugated section;

[0035] Figure 6-Figure 11 In the middle: 9 exhaust gas treatment system, 10 exhaust bellows assembly, 11 engine assembly, 12 frame assembly, 13 supercharged air outlet adapter, 14 exhaust bellows front section, 15 front section fixing bracket, 16 exhaust bellows rear section, 17 fixing bracket, 18 Z-type adapter bracket, 19 suspension cushion, 20 L-type fixing bracket, 21 urea injection port, 22 cooling system. DETAILED DESCRIPTION

[0036] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0038] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Embodiment 1:

[0040] like Figure 1-Figure 2As shown, in the exhaust bellows structure in the prior art, the urea injection port 7 is arranged on the straight section of the exhaust bellows assembly.

[0041] like Figure 3-Figure 5 As shown, the exhaust bellows assembly 1 is fixed to the frame assembly 5 through the exhaust bellows bracket 2, the after-treatment assembly 3 is located on the left side of the engine assembly, and the cooling system assembly 6 is located on the right side of the engine assembly. This is a traditional rear-mounted passenger car design structure.

[0042] Taking the vehicle's forward direction as the X direction, a rear-mounted long-distance bus designed for special purposes such as an on-board toilet is designed. Since the passenger door must be on the right side of the vehicle (Y direction), but the cooling system occupies a large X-direction space in the engine compartment, the cooling system 6 needs to be adjusted and arranged on the left side of the engine assembly 4. Influenced by this, the post-processing assembly 3 will be adjusted and arranged on the right side of the engine assembly 4, and the exhaust bellows assembly 1 spans the engine assembly 4. Due to the limitation of the cabin space, the top space of the engine assembly 4 is difficult to meet the layout space of the exhaust bellows assembly 1, resulting in the exhaust system of the rear-mounted engine bus with an on-board toilet cannot be arranged.

[0043] Therefore, the improved exhaust system structure is as follows Figure 6-Figure 8 As shown, compared to Figure 1-Figure 2 The improvements are: adding a pressurized air outlet adapter 13, an exhaust bellows front section 14, a front section fixing bracket 15, an exhaust bellows rear section 16, an exhaust bellows fixing bracket 17, a "Z" type adapter bracket 18, a suspension cushion 19, and an "L" type fixing bracket 20.

[0044] In this embodiment, the exhaust system structure includes an exhaust bellows front section 14 arranged in a vertical direction, and an exhaust bellows rear section 16 arranged in a horizontal direction. One end of the exhaust bellows front section 14 is connected to the engine assembly 11, and the other end is connected to one end of the exhaust bellows rear section 16 through a bent pipe. The other end of the exhaust bellows rear section 16 is connected to the exhaust gas treatment system 9 through a connecting pipe.

[0045] Furthermore, one end of the exhaust bellows front section 14 is connected to the engine assembly 11 via a boost outlet adapter 13 .

[0046] Furthermore, the front section 14 of the exhaust bellows is connected to the vehicle frame assembly 12 via a front section fixing bracket 15 .

[0047] Furthermore, the exhaust bellows rear section 16 is connected to the vehicle frame assembly 12 via a fixing bracket 17 .

[0048] Furthermore, the fixed bracket 17 is connected to the "Z"-shaped adapter bracket 18, the "Z"-shaped adapter bracket 18 is connected to the "L"-shaped fixed bracket 20, the "L"-shaped fixed bracket 20 is fixed on the frame assembly 12, and a suspension pad 19 is provided between the "Z"-shaped adapter bracket 18 and the "L"-shaped fixed bracket 20.

[0049] Furthermore, the urea injection port 21 is arranged on the straight section of the rear section 16 of the exhaust bellows.

[0050] Among them, the boost outlet adapter 13, the front section of the exhaust bellows 14 and the rear section of the exhaust bellows 16 are installed by plug-in; the front section of the exhaust bellows 14 is fixed to the frame assembly through the front section fixing bracket 15; the exhaust bellows fixing bracket 17, the "Z" type adapter bracket 18, the suspension cushion 19, and the "L" type fixing bracket 20 are bolted together, the suspension cushion 19 plays a buffering and shock absorbing role, and the "L" type fixing bracket 20 is fixed to the frame; the urea injection port 21 is arranged on the straight section of the rear section 16 of the exhaust bellows, the size of the front section of the injection port is a (for example, 195mm), the size of the rear section of the injection port is b (for example, 352mm), and the straight section assembly of the injection port a+b≥440mm improves the urea injection accuracy and urea atomization rate, and indirectly improves the post-processing work efficiency.

[0051] like Figure 9-11 As shown, the structure of the frame assembly 12 has been locked, the heat dissipation system 22 is arranged on the left side of the engine assembly 11, the exhaust gas treatment system 9 is arranged on the right side of the engine assembly 11 (the right rear compartment of the whole vehicle), there is no layout space on the upper part of the engine assembly 11, and the X-direction and Z-direction spaces of the engine compartment have been compressed to the limit. The exhaust bellows assembly 10 extends downward on the left side of the engine assembly 11, and after passing horizontally through the bottom of the engine assembly 11 (under the oil pan), it is connected to the post-treatment assembly 9. The surface of the exhaust bellows assembly 10 is covered with heat insulation material, and the bellows section and the suspension cushion jointly absorb the vibration energy from the engine assembly 11 and the post-treatment assembly 9.

[0052] The above structural design solves the problem that the exhaust system, especially the exhaust bellows, cannot be matched when the vehicle has an on-board toilet and the engine is rear-mounted, and provides a reliable solution for the matching and development of the exhaust system of compact engine compartment vehicles.

[0053] During implementation, in the exhaust system of rear-mounted long-distance buses designed for special purposes such as on-board toilets, the cooling system is changed from right to left, and the after-treatment system is changed from left to right, and the improved exhaust corrugated pipe structure and connection scheme are directly used.

[0054] Through the above improvement plan, the exhaust bellows provides a new idea for the design of the exhaust bellows of the exhaust system, solves the matching and design structure problems of the exhaust system in the compact engine compartment, and improves the urea injection accuracy and urea atomization rate, indirectly improving the efficiency of post-processing. The asynchronous vibration between the frame can be completely attenuated and absorbed by the suspension cushion and the bellows section, thereby reducing the risk of fatigue fracture of the exhaust bellows and ensuring its reliability.

[0055] Embodiment 2:

[0056] A second aspect of the utility model provides a motor vehicle having an engine assembly located in a rear compartment of the vehicle and equipped with an on-board toilet, wherein the engine assembly is connected to the engine exhaust system.

[0057] The cooling system is changed from right to left, and the after-treatment system is changed from left to right. The exhaust corrugated pipe assembly is led out from the left side of the engine assembly, extended downward to the bottom of the engine assembly, and after passing horizontally through the bottom of the engine assembly, it is connected to the after-treatment assembly. The resulting pipeline arrangement does not pass through the top space of the engine assembly, solving the problem of space limitation.

[0058] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An engine exhaust system having an exhaust corrugated pipe assembly, characterized in that: The exhaust bellows assembly includes an exhaust bellows front section and an exhaust bellows rear section. The exhaust bellows front section is arranged in a vertical direction, and the exhaust bellows rear section is arranged in a horizontal direction. One end of the exhaust bellows front section is connected to the engine assembly, and the other end is connected to one end of the exhaust bellows rear section through a bent pipe. The other end of the exhaust bellows rear section is connected to the exhaust gas treatment system; the exhaust gas treatment system is located on the right side of the engine assembly, and the heat dissipation system is located on the left side of the engine assembly.

2. The engine exhaust system according to claim 1, characterized in that: One end of the front section of the exhaust bellows is connected to the engine assembly through a pressurized air outlet adapter.

3. The engine exhaust system according to claim 1, characterized in that: The front section of the exhaust bellows is connected to the vehicle frame assembly via a front section fixing bracket.

4. The engine exhaust system according to claim 1, characterized in that: The rear section of the exhaust bellows is connected to the vehicle frame assembly via a fixing bracket.

5. The engine exhaust system according to claim 4, characterized in that: The fixing bracket is connected to the adapter bracket, the adapter bracket is connected to the "L"-shaped fixing bracket, and the "L"-shaped fixing bracket is fixed on the frame assembly.

6. The engine exhaust system according to claim 5, characterized in that: A suspension cushion is provided between the adapter bracket and the "L"-shaped fixed bracket.

7. The engine exhaust system according to claim 1, characterized in that: The urea injection port is arranged on the straight section of the rear section of the exhaust bellows.

8. The engine exhaust system according to claim 1, characterized in that: The exhaust corrugated pipe assembly is led out from the left side of the engine assembly, extends downward to the bottom of the engine assembly, and is connected to the post-processing assembly after passing through the bottom of the engine assembly horizontally.

9. The engine exhaust system according to claim 1, characterized in that: The surface of the exhaust bellows pipeline assembly is covered with heat insulation material.

10. A motor vehicle, characterized in that: The invention comprises an engine assembly and a vehicle-mounted toilet located in a rear compartment of a vehicle, wherein the engine assembly is connected to an engine exhaust system as claimed in any one of claims 1 to 9.

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